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Wavelength

The wavelength of a wave describes how long the wave is. The distance from
one crest to the next, or from one trough to the next, of a wave is its wavelength.
Water waves in the ocean, sound waves in air, and light waves of electromagnetic
radiation all have wavelengths.

The greek letter "l" (lambda) is often used in equations to
represent wavelength. The wavelength of a wave is inversely proportional to
the wave's
frequency. A long wavelength means a low frequency, while a short wavelength
means a high frequency.

The frequency and wavelength of a wave are related to each other by this equation:

l = c / f

where "l" is the wavelength, "c" is the speed of
the wave, and "f" is the frequency. For light or other electromagnetic
waves traveling in a vacuum, c = 299,792.458 km/sec (186,282 miles/sec), the
speed of light.
For sound waves moving through air, c is around 343 meters/second (767 miles/hour).

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